Condat [1]} also discusses a variant
of (REF ), which we will call the
dual Condat–Vũ algorithm:
\(z^{(k+1)} &= \mathrm {prox}_{\sigma g^\ast } (z^{(k)}+\sigma Ax^{(k)}) \\x^{(k+1)} &= \mathrm {prox}_{\tau f}\big (x^{(k)}-\tau (A^T(2z^{(k+1)}-z^{(k)})+\nabla h(x^{(k)})) \big ).\) 
